Research Solutions, Inc. - RSSS
Detailed investor-level table based on 13F positions.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| NEEDHAM INVESTMENT MANAGEMENT LLC | History | Added to | 3,155,000 | 7,130 | 0.36% | 0.58% | 1 | +10,000 | 0.32% | Q1 2026 | May 14, 2026 |
| PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. | History | Added to | 2,552,455 | 5,768 | 0.33% | 0.43% | 2 | +53,145 | 2.13% | Q1 2026 | May 15, 2026 |
| VANGUARD GROUP INC | History | No change | 1,264,105 | 3,716 | 0.0% | 0.0% | 3 | 0 | 0.0% | Q4 2025 | Jan 29, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | History | New | 1,133,471 | 2,561 | 0.0% | — | 4 | +1,133,471 | New | Q1 2026 | May 15, 2026 |
| Luxor Capital Group, LP | History | No change | 651,959 | 1,473 | 0.1% | 0.15% | 5 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| BARD ASSOCIATES INC | History | Reduced | 608,402 | 1,374 | 0.34% | 0.46% | 6 | -1,982 | -0.32% | Q1 2026 | May 07, 2026 |
| PERRITT CAPITAL MANAGEMENT INC | History | No change | 356,818 | 1,049 | 1.75% | 1.75% | 7 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Topline Capital Management, LLC | History | Reduced | 461,177 | 1,042 | 0.17% | 0.15% | 8 | -93,329 | -16.83% | Q1 2026 | May 15, 2026 |
| PARTHENON LLC | History | No change | 392,284 | 886 | 0.1% | 0.12% | 9 | 0 | 0.0% | Q1 2026 | Apr 28, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Added to | 335,159 | 757 | 0.0% | 0.0% | 10 | +47,244 | 16.41% | Q1 2026 | May 15, 2026 |
| North Star Investment Management Corp. | History | New | 333,518 | 753 | 0.05% | — | 11 | +333,518 | New | Q1 2026 | Apr 23, 2026 |
| Dynamic Advisor Solutions LLC | History | Added to | 317,692 | 717 | 0.02% | 0.03% | 12 | +28,175 | 9.73% | Q1 2026 | Apr 08, 2026 |
| Navalign, LLC | History | Added to | 251,126 | 567 | 0.14% | 0.07% | 13 | +152,546 | 154.74% | Q1 2026 | Apr 29, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | History | Reduced | 176,900 | 399 | 0.0% | 0.0% | 14 | -41,300 | -18.93% | Q1 2026 | May 14, 2026 |
| VANGUARD FIDUCIARY TRUST CO | History | New | 151,365 | 342 | 0.0% | — | 15 | +151,365 | New | Q1 2026 | May 08, 2026 |
| LPL Financial LLC | History | No change | 146,307 | 330 | 0.0% | 0.0% | 16 | 0 | 0.0% | Q1 2026 | May 06, 2026 |
| BlackRock, Inc. | History | Added to | 120,238 | 271 | 0.0% | 0.0% | 17 | +3,622 | 3.11% | Q1 2026 | May 13, 2026 |
| Hillsdale Investment Management Inc. | History | Reduced | 86,000 | 194 | 0.01% | 0.01% | 18 | -12,000 | -12.24% | Q1 2026 | May 04, 2026 |
| 4Thought Financial Group Inc. | History | Reduced | 83,406 | 188 | 0.09% | 0.12% | 19 | -779 | -0.93% | Q1 2026 | Apr 24, 2026 |
| DIMENSIONAL FUND ADVISORS LP | History | Added to | 77,962 | 176 | 0.0% | 0.0% | 20 | +933 | 1.21% | Q1 2026 | May 07, 2026 |
| Integrated Quantitative Investments LLC | History | No change | 72,500 | 163 | 0.03% | 0.05% | 21 | 0 | 0.0% | Q1 2026 | May 13, 2026 |
| ACADIAN ASSET MANAGEMENT LLC | History | Reduced | 65,835 | 147 | 0.0% | 0.0% | 22 | -11,797 | -15.2% | Q1 2026 | May 13, 2026 |
| STATE STREET CORP | History | No change | 58,807 | 132 | 0.0% | 0.0% | 23 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| NORTHERN TRUST CORP | History | No change | 56,619 | 127 | 0.0% | 0.0% | 24 | 0 | 0.0% | Q1 2026 | May 14, 2026 |
| Rothschild Wealth LLC | History | Reduced | 51,300 | 115 | 0.01% | 0.1% | 25 | -305,518 | -85.62% | Q1 2026 | May 06, 2026 |
| GOLDMAN SACHS GROUP INC | History | Added to | 46,627 | 105 | 0.0% | 0.0% | 26 | +3,648 | 8.49% | Q1 2026 | May 15, 2026 |
| Greenhaven Road Investment Management, L.P. | History | No change | 38,477 | 86 | 0.06% | 0.02% | 27 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| CITADEL ADVISORS LLC | History | Added to | 35,740 | 80 | 0.0% | 0.0% | 28 | +6,975 | 24.25% | Q1 2026 | May 15, 2026 |
| KING LUTHER CAPITAL MANAGEMENT CORP | History | No change | 35,000 | 79 | 0.0% | 0.0% | 29 | 0 | 0.0% | Q1 2026 | May 08, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Reduced | 34,862 | 78 | 0.0% | 0.0% | 30 | -13,140 | -27.37% | Q1 2026 | May 15, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | History | No change | 18,069 | 40 | 0.0% | 0.0% | 31 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| BOOTHBAY FUND MANAGEMENT, LLC | History | New | 16,313 | 36 | 0.0% | — | 32 | +16,313 | New | Q1 2026 | May 15, 2026 |
| XTX Topco Ltd | History | Reduced | 12,711 | 28 | 0.0% | 0.0% | 33 | -9,319 | -42.3% | Q1 2026 | May 15, 2026 |
| STIFEL FINANCIAL CORP | History | New | 11,000 | 24 | 0.0% | — | 34 | +11,000 | New | Q1 2026 | May 12, 2026 |
| Financial Management Professionals, Inc. | History | New | 5,416 | 12 | 0.0% | — | 35 | +5,416 | New | Q1 2026 | Apr 15, 2026 |
| Vanguard Global Advisers, LLC | History | New | 5,356 | 12 | 0.0% | — | 36 | +5,356 | New | Q1 2026 | May 08, 2026 |
| UBS Group AG | History | Added to | 3,723 | 8 | 0.0% | 0.0% | 37 | +1,378 | 58.76% | Q1 2026 | May 05, 2026 |
| Tower Research Capital LLC (TRC) | History | Added to | 1,272 | 2 | 0.0% | 0.0% | 38 | +120 | 10.42% | Q1 2026 | May 15, 2026 |
| HighTower Advisors, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -68,336 | -100.0% | Q1 2026 | May 05, 2026 |
| JANE STREET GROUP, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -25,826 | -100.0% | Q1 2026 | May 12, 2026 |
| BANK OF AMERICA CORP /DE/ | History | Closed out | 0 | 0 | — | 0.0% | — | -10,989 | -100.0% | Q1 2026 | May 15, 2026 |
| Ancora Advisors LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -3,490 | -100.0% | Q1 2026 | May 15, 2026 |
| NewEdge Advisors, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -3,370 | -100.0% | Q1 2026 | May 15, 2026 |
| MORGAN STANLEY | History | Closed out | 0 | 0 | — | 0.0% | — | -1,932 | -100.0% | Q1 2026 | May 15, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | Closed out | 0 | 0 | — | 0.0% | — | -468 | -100.0% | Q1 2026 | May 12, 2026 |
| Caitong International Asset Management Co., Ltd | History | New | 3 | 0 | — | — | — | +3 | New | Q1 2026 | May 11, 2026 |
| WELLS FARGO & COMPANY/MN | History | No change | 1 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 11, 2026 |
| Allworth Financial LP | History | No change | 104 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 14, 2026 |